How is the ratio between diesel from diesel hydrocracking and naphtha adjusted?
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Under normal production conditions, the yield of diesel plus naphtha is over 99%, with the proportion of naphtha being less than 10%. However, sometimes in order to adjust the cetane number, the degree of cracking is increased, resulting in an excessive amount of naphtha being produced and a lower yield of diesel. It is worth considering whether it is feasible to incorporate as much naphtha as possible into the diesel while still ensuring that both the cetane number and flash point of the final diesel meet the required standards, thereby increasing the diesel yield. Additionally, is there a definite relationship between the dry point of naphtha and the cetane number of the final diesel? Does adjusting the dry point of naphtha affect the cetane number of the final diesel? I would like to ask the experts here. . .
Isn’t the key factor in dry processing simply the level of yield?
Temperatures of 50 and 95 degrees have a significant impact on the cetane number; generally, naphtha with a flash point that meets the requirements is used in diesel components, which results in a lower density of the diesel. There is a formula for calculating the cetane number, and a lower density as well as higher temperatures at 50 and 95 degrees lead to an increased cetane number. These are just my personal opinions for reference only